javax.crypto.spec

Class RC2ParameterSpec

Table des matières
  • All Implemented Interfaces:
    AlgorithmParameterSpec

    public class RC2ParameterSpec
extends Object
implements AlgorithmParameterSpec
    This class specifies the parameters used with the RC2 algorithm.

    The parameters consist of an effective key size and optionally an 8-byte initialization vector (IV) (only in feedback mode).

    This class can be used to initialize a Cipher object that implements the RC2 algorithm.

    Since:
    1.4

    • Constructor Summary

      Constructors 
      Constructor and Description
      RC2ParameterSpec(int effectiveKeyBits)
      Constructs a parameter set for RC2 from the given effective key size (in bits).
      RC2ParameterSpec(int effectiveKeyBits, byte[] iv)
      Constructs a parameter set for RC2 from the given effective key size (in bits) and an 8-byte IV.
      RC2ParameterSpec(int effectiveKeyBits, byte[] iv, int offset)
      Constructs a parameter set for RC2 from the given effective key size (in bits) and IV.

        

    • Constructor Detail

      • RC2ParameterSpec

        public RC2ParameterSpec(int effectiveKeyBits)
        Constructs a parameter set for RC2 from the given effective key size (in bits).
        Parameters:
        effectiveKeyBits - the effective key size in bits.

      • RC2ParameterSpec

        public RC2ParameterSpec(int effectiveKeyBits,
                byte[] iv)
        Constructs a parameter set for RC2 from the given effective key size (in bits) and an 8-byte IV.

        The bytes that constitute the IV are those between iv[0] and iv[7] inclusive.

        Parameters:
        effectiveKeyBits - the effective key size in bits.
        iv - the buffer with the 8-byte IV. The first 8 bytes of the buffer are copied to protect against subsequent modification.
        Throws:
        IllegalArgumentException - if iv is null.

      • RC2ParameterSpec

        public RC2ParameterSpec(int effectiveKeyBits,
                byte[] iv,
                int offset)
        Constructs a parameter set for RC2 from the given effective key size (in bits) and IV.

        The IV is taken from iv, starting at offset inclusive. The bytes that constitute the IV are those between iv[offset] and iv[offset+7] inclusive.

        Parameters:
        effectiveKeyBits - the effective key size in bits.
        iv - the buffer with the IV. The first 8 bytes of the buffer beginning at offset inclusive are copied to protect against subsequent modification.
        offset - the offset in iv where the 8-byte IV starts.
        Throws:
        IllegalArgumentException - if iv is null.

    • Method Detail

      • getEffectiveKeyBits

        public int getEffectiveKeyBits()
        Returns the effective key size in bits.
        Returns:
        the effective key size in bits.

      • getIV

        public byte[] getIV()
        Returns the IV or null if this parameter set does not contain an IV.
        Returns:
        the IV or null if this parameter set does not contain an IV. Returns a new array each time this method is called.

      • equals

        public boolean equals(Object obj)
        Tests for equality between the specified object and this object. Two RC2ParameterSpec objects are considered equal if their effective key sizes and IVs are equal. (Two IV references are considered equal if both are null.)
        Overrides:
        equals in class Object
        Parameters:
        obj - the object to test for equality with this object.
        Returns:
        true if the objects are considered equal, false if obj is null or otherwise.
        See Also:
        Object.hashCode(), HashMap

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Document créé le 30/08/2006, dernière modification le 04/03/2020
Source du document imprimé : https://www.gaudry.be/java-api-rf-javax/crypto/spec/rc2parameterspec.html

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